title: Late onset post-keratoplasty astigmatism in patients with keratoconus.
mesh_terms: D000328:Adult; D001251:Astigmatism / Q000209:etiology* / Q000473:pathology; D003315:Cornea / Q000473:pathology; D005260:Female; D006801:Humans; D007640:Keratoconus / Q000473:pathology / Q000601:surgery*; D015948:Keratoplasty, Penetrating / Q000009:adverse effects*; D008297:Male; D012189:Retrospective Studies; D013997:Time Factors